IOS 字典轉json 解決全角問題

引用頭文件 <pre name="code" class="objc">JSONKit.h

<span style="font-family: Arial, Helvetica, sans-serif;">// 字典轉成json，解決全角問題</span>

-(NSString *) toJson:(NSMutableDictionary*)dic
{
    // 轉換成json
    NSString * string =[dic JSONString];
    
    NSUInteger length = [string length];
    NSMutableString *s = [NSMutableString stringWithCapacity:0];    

    // 全角沒有轉換成unicode，再進行轉換
    for (int i = 0;i < length; i++)
    {
        const char *p;
        
        NSString * isChar = [string substringWithRange:NSMakeRange(i, 1)];
        
        p = [isChar UTF8String];
        
        // 判斷是不是全角字符
        if ((*p)&0x80) {
            NSString *str = [NSString stringWithFormat:@"\\u%x", [string characterAtIndex:i]];
            if (str.length == 6) {
                [s appendString:str];
            } else {
                str = [NSString stringWithFormat:@"\\u00%x", [string characterAtIndex:i]];
                
                [s appendString:str];
            }
        } else {
            [s appendFormat:@"%@",[string substringWithRange:NSMakeRange(i, 1)]];
        }
    }
    
    return s;
}

轉換結果："KEY1\":\"\\u6d41\\u91d1\\u5c81\\u6708\\u7cfb\\u5217 48\",\"KEY2\":\"312201\",\"KEY3\":\"310101\"  。。。。。。